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493 lines
16 KiB
493 lines
16 KiB
--
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-- ChatThrottleLib by Mikk
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--
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-- Manages AddOn chat output to keep player from getting kicked off.
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--
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-- ChatThrottleLib:SendChatMessage/:SendAddonMessage functions that accept
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-- a Priority ("BULK", "NORMAL", "ALERT") as well as prefix for SendChatMessage.
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--
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-- Priorities get an equal share of available bandwidth when fully loaded.
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-- Communication channels are separated on extension+chattype+destination and
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-- get round-robinned. (Destination only matters for whispers and channels,
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-- obviously)
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--
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-- Will install hooks for SendChatMessage and SendAddonMessage to measure
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-- bandwidth bypassing the library and use less bandwidth itself.
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--
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--
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-- Fully embeddable library. Just copy this file into your addon directory,
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-- add it to the .toc, and it's done.
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--
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-- Can run as a standalone addon also, but, really, just embed it! :-)
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--
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-- LICENSE: ChatThrottleLib is released into the Public Domain
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--
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local CTL_VERSION = 23
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if ChatThrottleLib then
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if ChatThrottleLib.version >= CTL_VERSION then
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-- There's already a newer (or same) version loaded. Buh-bye.
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return
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elseif not ChatThrottleLib.securelyHooked then
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print("ChatThrottleLib: Warning: There's an ANCIENT ChatThrottleLib.lua (pre-wow 2.0, <v16) in an addon somewhere. Get the addon updated or copy in a newer ChatThrottleLib.lua (>=v16) in it!")
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-- ATTEMPT to unhook; this'll behave badly if someone else has hooked...
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-- ... and if someone has securehooked, they can kiss that goodbye too... >.<
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SendChatMessage = ChatThrottleLib.ORIG_SendChatMessage
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if ChatThrottleLib.ORIG_SendAddonMessage then
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SendAddonMessage = ChatThrottleLib.ORIG_SendAddonMessage
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end
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end
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ChatThrottleLib.ORIG_SendChatMessage = nil
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ChatThrottleLib.ORIG_SendAddonMessage = nil
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end
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if not ChatThrottleLib then
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ChatThrottleLib = {}
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end
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ChatThrottleLib = ChatThrottleLib -- in case some addon does "local ChatThrottleLib" above us and we're copypasted (AceComm-2, sigh)
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local ChatThrottleLib = ChatThrottleLib
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ChatThrottleLib.version = CTL_VERSION
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------------------ TWEAKABLES -----------------
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ChatThrottleLib.MAX_CPS = 800 -- 2000 seems to be safe if NOTHING ELSE is happening. let's call it 800.
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ChatThrottleLib.MSG_OVERHEAD = 40 -- Guesstimate overhead for sending a message; source+dest+chattype+protocolstuff
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ChatThrottleLib.BURST = 4000 -- WoW's server buffer seems to be about 32KB. 8KB should be safe, but seen disconnects on _some_ servers. Using 4KB now.
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ChatThrottleLib.MIN_FPS = 20 -- Reduce output CPS to half (and don't burst) if FPS drops below this value
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local setmetatable = setmetatable
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local table_remove = table.remove
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local tostring = tostring
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local GetTime = GetTime
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local math_min = math.min
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local math_max = math.max
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local next = next
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local strlen = string.len
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local GetFramerate = GetFramerate
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local strlower = string.lower
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local unpack, type, pairs, wipe = unpack, type, pairs, wipe
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local UnitInRaid, UnitInParty = UnitInRaid, UnitInParty
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-----------------------------------------------------------------------
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-- Double-linked ring implementation
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local Ring = {}
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local RingMeta = { __index = Ring }
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function Ring:New()
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local ret = {}
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setmetatable(ret, RingMeta)
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return ret
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end
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function Ring:Add(obj) -- Append at the "far end" of the ring (aka just before the current position)
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if self.pos then
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obj.prev = self.pos.prev
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obj.prev.next = obj
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obj.next = self.pos
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obj.next.prev = obj
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else
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obj.next = obj
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obj.prev = obj
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self.pos = obj
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end
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end
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function Ring:Remove(obj)
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obj.next.prev = obj.prev
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obj.prev.next = obj.next
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if self.pos == obj then
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self.pos = obj.next
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if self.pos == obj then
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self.pos = nil
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end
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end
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end
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-----------------------------------------------------------------------
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-- Recycling bin for pipes
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-- A pipe is a plain integer-indexed queue of messages
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-- Pipes normally live in Rings of pipes (3 rings total, one per priority)
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ChatThrottleLib.PipeBin = nil -- pre-v19, drastically different
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local PipeBin = setmetatable({}, { __mode = "k" })
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local function DelPipe(pipe)
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PipeBin[pipe] = true
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end
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local function NewPipe()
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local pipe = next(PipeBin)
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if pipe then
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wipe(pipe)
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PipeBin[pipe] = nil
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return pipe
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end
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return {}
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end
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-----------------------------------------------------------------------
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-- Recycling bin for messages
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ChatThrottleLib.MsgBin = nil -- pre-v19, drastically different
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local MsgBin = setmetatable({}, { __mode = "k" })
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local function DelMsg(msg)
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msg[1] = nil
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-- there's more parameters, but they're very repetetive so the string pool doesn't suffer really, and it's faster to just not delete them.
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MsgBin[msg] = true
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end
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local function NewMsg()
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local msg = next(MsgBin)
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if msg then
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MsgBin[msg] = nil
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return msg
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end
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return {}
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end
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-----------------------------------------------------------------------
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-- ChatThrottleLib:Init
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-- Initialize queues, set up frame for OnUpdate, etc
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function ChatThrottleLib:Init()
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-- Set up queues
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if not self.Prio then
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self.Prio = {}
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self.Prio["ALERT"] = { ByName = {}, Ring = Ring:New(), avail = 0 }
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self.Prio["NORMAL"] = { ByName = {}, Ring = Ring:New(), avail = 0 }
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self.Prio["BULK"] = { ByName = {}, Ring = Ring:New(), avail = 0 }
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end
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-- v4: total send counters per priority
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for _, Prio in pairs(self.Prio) do
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Prio.nTotalSent = Prio.nTotalSent or 0
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end
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if not self.avail then
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self.avail = 0 -- v5
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end
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if not self.nTotalSent then
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self.nTotalSent = 0 -- v5
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end
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-- Set up a frame to get OnUpdate events
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if not self.Frame then
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self.Frame = CreateFrame("Frame")
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self.Frame:Hide()
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end
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self.Frame:SetScript("OnUpdate", self.OnUpdate)
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self.Frame:SetScript("OnEvent", self.OnEvent) -- v11: Monitor P_E_W so we can throttle hard for a few seconds
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self.Frame:RegisterEvent("PLAYER_ENTERING_WORLD")
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self.OnUpdateDelay = 0
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self.LastAvailUpdate = GetTime()
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self.HardThrottlingBeginTime = GetTime() -- v11: Throttle hard for a few seconds after startup
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-- Hook SendChatMessage and SendAddonMessage so we can measure unpiped traffic and avoid overloads (v7)
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if not self.securelyHooked then
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-- Use secure hooks as of v16. Old regular hook support yanked out in v21.
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self.securelyHooked = true
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--SendChatMessage
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hooksecurefunc("SendChatMessage", function(...)
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return ChatThrottleLib.Hook_SendChatMessage(...)
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end)
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--SendAddonMessage
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hooksecurefunc("SendAddonMessage", function(...)
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return ChatThrottleLib.Hook_SendAddonMessage(...)
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end)
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end
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self.nBypass = 0
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end
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-----------------------------------------------------------------------
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-- ChatThrottleLib.Hook_SendChatMessage / .Hook_SendAddonMessage
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local bMyTraffic = false
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function ChatThrottleLib.Hook_SendChatMessage(text, chattype, language, destination, ...)
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if bMyTraffic then
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return
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end
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local self = ChatThrottleLib
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local size = strlen(tostring(text or "")) + strlen(tostring(destination or "")) + self.MSG_OVERHEAD
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self.avail = self.avail - size
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self.nBypass = self.nBypass + size -- just a statistic
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end
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function ChatThrottleLib.Hook_SendAddonMessage(prefix, text, chattype, destination, ...)
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if bMyTraffic then
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return
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end
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local self = ChatThrottleLib
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local size = tostring(text or ""):len() + tostring(prefix or ""):len()
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size = size + tostring(destination or ""):len() + self.MSG_OVERHEAD
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self.avail = self.avail - size
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self.nBypass = self.nBypass + size -- just a statistic
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end
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-----------------------------------------------------------------------
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-- ChatThrottleLib:UpdateAvail
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-- Update self.avail with how much bandwidth is currently available
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function ChatThrottleLib:UpdateAvail()
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local now = GetTime()
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local MAX_CPS = self.MAX_CPS
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local newavail = MAX_CPS * (now - self.LastAvailUpdate)
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local avail = self.avail
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if now - self.HardThrottlingBeginTime < 5 then
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-- First 5 seconds after startup/zoning: VERY hard clamping to avoid irritating the server rate limiter, it seems very cranky then
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avail = math_min(avail + (newavail * 0.1), MAX_CPS * 0.5)
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self.bChoking = true
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elseif GetFramerate() < self.MIN_FPS then -- GetFrameRate call takes ~0.002 secs
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avail = math_min(MAX_CPS, avail + newavail * 0.5)
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self.bChoking = true -- just a statistic
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else
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avail = math_min(self.BURST, avail + newavail)
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self.bChoking = false
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end
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avail = math_max(avail, 0 - (MAX_CPS * 2)) -- Can go negative when someone is eating bandwidth past the lib. but we refuse to stay silent for more than 2 seconds; if they can do it, we can.
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self.avail = avail
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self.LastAvailUpdate = now
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return avail
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end
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-----------------------------------------------------------------------
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-- Despooling logic
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-- Reminder:
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-- - We have 3 Priorities, each containing a "Ring" construct ...
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-- - ... made up of N "Pipe"s (1 for each destination/pipename)
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-- - and each pipe contains messages
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function ChatThrottleLib:Despool(Prio)
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local ring = Prio.Ring
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while ring.pos and Prio.avail > ring.pos[1].nSize do
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local msg = table_remove(ring.pos, 1)
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if not ring.pos[1] then -- did we remove last msg in this pipe?
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local pipe = Prio.Ring.pos
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Prio.Ring:Remove(pipe)
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Prio.ByName[pipe.name] = nil
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DelPipe(pipe)
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else
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Prio.Ring.pos = Prio.Ring.pos.next
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end
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local didSend = false
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local lowerDest = strlower(msg[3] or "")
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if lowerDest == "raid" and not UnitInRaid("player") then
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-- do nothing
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elseif lowerDest == "party" and not UnitInParty("player") then
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-- do nothing
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else
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Prio.avail = Prio.avail - msg.nSize
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bMyTraffic = true
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msg.f(unpack(msg, 1, msg.n))
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bMyTraffic = false
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Prio.nTotalSent = Prio.nTotalSent + msg.nSize
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DelMsg(msg)
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didSend = true
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end
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-- notify caller of delivery (even if we didn't send it)
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if msg.callbackFn then
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msg.callbackFn(msg.callbackArg, didSend)
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end
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-- USER CALLBACK MAY ERROR
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end
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end
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function ChatThrottleLib.OnEvent(this, event)
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-- v11: We know that the rate limiter is touchy after login. Assume that it's touchy after zoning, too.
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local self = ChatThrottleLib
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if event == "PLAYER_ENTERING_WORLD" then
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self.HardThrottlingBeginTime = GetTime() -- Throttle hard for a few seconds after zoning
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self.avail = 0
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end
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end
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function ChatThrottleLib.OnUpdate(this, delay)
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local self = ChatThrottleLib
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self.OnUpdateDelay = self.OnUpdateDelay + delay
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if self.OnUpdateDelay < 0.08 then
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return
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end
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self.OnUpdateDelay = 0
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self:UpdateAvail()
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if self.avail < 0 then
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return -- argh. some bastard is spewing stuff past the lib. just bail early to save cpu.
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end
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-- See how many of our priorities have queued messages (we only have 3, don't worry about the loop)
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local n = 0
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for prioname, Prio in pairs(self.Prio) do
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if Prio.Ring.pos or Prio.avail < 0 then
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n = n + 1
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end
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end
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-- Anything queued still?
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if n < 1 then
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-- Nope. Move spillover bandwidth to global availability gauge and clear self.bQueueing
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for prioname, Prio in pairs(self.Prio) do
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self.avail = self.avail + Prio.avail
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Prio.avail = 0
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end
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self.bQueueing = false
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self.Frame:Hide()
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return
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end
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-- There's stuff queued. Hand out available bandwidth to priorities as needed and despool their queues
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local avail = self.avail / n
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self.avail = 0
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for prioname, Prio in pairs(self.Prio) do
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if Prio.Ring.pos or Prio.avail < 0 then
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Prio.avail = Prio.avail + avail
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if Prio.Ring.pos and Prio.avail > Prio.Ring.pos[1].nSize then
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self:Despool(Prio)
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-- Note: We might not get here if the user-supplied callback function errors out! Take care!
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end
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end
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end
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end
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-----------------------------------------------------------------------
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-- Spooling logic
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function ChatThrottleLib:Enqueue(prioname, pipename, msg)
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local Prio = self.Prio[prioname]
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local pipe = Prio.ByName[pipename]
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if not pipe then
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self.Frame:Show()
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pipe = NewPipe()
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pipe.name = pipename
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Prio.ByName[pipename] = pipe
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Prio.Ring:Add(pipe)
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end
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pipe[#pipe + 1] = msg
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self.bQueueing = true
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end
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function ChatThrottleLib:SendChatMessage(prio, prefix, text, chattype, language, destination, queueName, callbackFn, callbackArg)
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if not self or not prio or not prefix or not text or not self.Prio[prio] then
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error('Usage: ChatThrottleLib:SendChatMessage("{BULK||NORMAL||ALERT}", "prefix", "text"[, "chattype"[, "language"[, "destination"]]]', 2)
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end
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if callbackFn and type(callbackFn) ~= "function" then
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error("ChatThrottleLib:ChatMessage(): callbackFn: expected function, got " .. type(callbackFn), 2)
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end
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local nSize = text:len()
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if nSize > 255 then
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error("ChatThrottleLib:SendChatMessage(): message length cannot exceed 255 bytes", 2)
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end
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nSize = nSize + self.MSG_OVERHEAD
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-- Check if there's room in the global available bandwidth gauge to send directly
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if not self.bQueueing and nSize < self:UpdateAvail() then
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self.avail = self.avail - nSize
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bMyTraffic = true
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_G.SendChatMessage(text, chattype, language, destination)
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bMyTraffic = false
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self.Prio[prio].nTotalSent = self.Prio[prio].nTotalSent + nSize
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if callbackFn then
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callbackFn(callbackArg, true)
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end
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-- USER CALLBACK MAY ERROR
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return
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end
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-- Message needs to be queued
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local msg = NewMsg()
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msg.f = _G.SendChatMessage
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msg[1] = text
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msg[2] = chattype or "SAY"
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msg[3] = language
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msg[4] = destination
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msg.n = 4
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msg.nSize = nSize
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msg.callbackFn = callbackFn
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msg.callbackArg = callbackArg
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self:Enqueue(prio, queueName or (prefix .. (chattype or "SAY") .. (destination or "")), msg)
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end
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function ChatThrottleLib:SendAddonMessage(prio, prefix, text, chattype, target, queueName, callbackFn, callbackArg)
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if not self or not prio or not prefix or not text or not chattype or not self.Prio[prio] then
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error('Usage: ChatThrottleLib:SendAddonMessage("{BULK||NORMAL||ALERT}", "prefix", "text", "chattype"[, "target"])', 2)
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end
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if callbackFn and type(callbackFn) ~= "function" then
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error("ChatThrottleLib:SendAddonMessage(): callbackFn: expected function, got " .. type(callbackFn), 2)
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end
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local nSize = text:len()
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if RegisterAddonMessagePrefix then
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if nSize > 255 then
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error("ChatThrottleLib:SendAddonMessage(): message length cannot exceed 255 bytes", 2)
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end
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else
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nSize = nSize + prefix:len() + 1
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if nSize > 255 then
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error("ChatThrottleLib:SendAddonMessage(): prefix + message length cannot exceed 254 bytes", 2)
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end
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end
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nSize = nSize + self.MSG_OVERHEAD
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-- Check if there's room in the global available bandwidth gauge to send directly
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if not self.bQueueing and nSize < self:UpdateAvail() then
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self.avail = self.avail - nSize
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bMyTraffic = true
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_G.SendAddonMessage(prefix, text, chattype, target)
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bMyTraffic = false
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self.Prio[prio].nTotalSent = self.Prio[prio].nTotalSent + nSize
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if callbackFn then
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callbackFn(callbackArg, true)
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end
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-- USER CALLBACK MAY ERROR
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return
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end
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-- Message needs to be queued
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local msg = NewMsg()
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msg.f = _G.SendAddonMessage
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msg[1] = prefix
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msg[2] = text
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msg[3] = chattype
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msg[4] = target
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msg.n = (target ~= nil) and 4 or 3
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msg.nSize = nSize
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msg.callbackFn = callbackFn
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msg.callbackArg = callbackArg
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self:Enqueue(prio, queueName or (prefix .. chattype .. (target or "")), msg)
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end
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-----------------------------------------------------------------------
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-- Get the ball rolling!
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ChatThrottleLib:Init()
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--[[ WoWBench debugging snippet
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if(WOWB_VER) then
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local function SayTimer()
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print("SAY: "..GetTime().." "..arg1)
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end
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ChatThrottleLib.Frame:SetScript("OnEvent", SayTimer)
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ChatThrottleLib.Frame:RegisterEvent("CHAT_MSG_SAY")
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end
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]]
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